|Número de publicación||US6155083 A|
|Tipo de publicación||Concesión|
|Número de solicitud||US 09/021,385|
|Fecha de publicación||5 Dic 2000|
|Fecha de presentación||10 Feb 1998|
|Fecha de prioridad||14 Feb 1997|
|También publicado como||DE19705737A1, DE19705737C2, EP0858790A2, EP0858790A3, EP0858790B1|
|Número de publicación||021385, 09021385, US 6155083 A, US 6155083A, US-A-6155083, US6155083 A, US6155083A|
|Inventores||Hans Joachim Goeser, Egon Grundig|
|Cesionario original||Spinnerei C.B. Goldner Gmbh & Co.|
|Exportar cita||BiBTeX, EndNote, RefMan|
|Citas de patentes (14), Citada por (33), Clasificaciones (8), Eventos legales (8)|
|Enlaces externos: USPTO, Cesión de USPTO, Espacenet|
The invention relates to an absorbent body for medical use, made of 100% cotton fibers, and to a method for its production.
Absorbent bodies for medical use are employed for absorbing and removing bodily fluids. They are counted among the so-called staple bandaging materials and must be physiologically safe, dependable and simple to manipulate as well as cost effective.
Initially, loose fibers, preferably natural fibers, are held together in absorbent bodies for medical use either by prior formation of yarn and subsequent weaving, by random positions of the fibers, by quilting or by means of an appropriate cover material, in such a way that the individual fibers are prevented from drifting apart. Only by means of this effect are the absorption of fluids and the storage capability assured, which should amount to a multiple of the inherent weight of the absorbent body. Only if the individual fibers are dependably kept together in the absorbent body is it possible to remove, or respectively draw out the absorbed bodily fluids and take them away.
If the fibers are only insufficiently connected with each other, the absorbent body cannot be removed as a whole, and therefore neither can the fluids it has absorbed. The fibers and fiber remnants which become separated remain in the body and can lead to dangerous defensive reactions.
The ability of an absorbent body to absorb is maximized when all fiber tips are of the same height and are oriented parallel. The storage volume and retaining capacity depend on the so-called capillary effect, i.e. on the distance of parallel oriented fibers from each other, the affinity of the fibers to the secreted matter and the consistency of the secreted matter. The ability of the fibers to bind fluids decreases, the more and the greater the area of the fiber surface is occupied by connecting points with other fibers. Therefore every development of an optimally absorbent body must optimally combine the partially opposing requirements, namely a high degree of fiber integration and a large ability to absorb and retain fluids.
The methods for producing absorbent bodies for medical use, which are part of the prior art and known per se, are the formation of woven or knit materials made of cotton yarn, the production of nonwovens of all types made of cotton, viscose or artificial fibers, as well as quilted or enclosed fibrous webs, or respectively layers of fibers.
Further, an adhesive dressing, for example, is known from the prior art (German Letters Patent 667 940), wherein a support, provided with an adhesive on one side, is used, on which an elastically constituted wound cover made of a woven or knit material is arranged. In this case the support is made of a porous random-fiber nonwoven.
In order to reduce the ability of loose fiber connections to unravel, while maintaining the maximum ability to absorb and retain fluids, it is furthermore a part of the prior art to select combinations between solid and loose connections, for example cotton wool with nonwoven materials or woven envelopes, or absorption layers with woven or non-woven covers. The disadvantage of these bonded layers lies in their insufficient interlocking with each other, or respectively the relatively elaborate production and, in case of a chemical connection between the layers themselves, their lack of physiological safety.
It is accordingly the object of the instant invention to provide an absorbent body for medical use as well as a method for its production, where the finished product has great fluid absorption and retention ability, together with strong fiber bonding.
In accordance with the invention, this object is attained in connection with an absorbent body for medical use made of 100% cotton fibers by means of a top and bottom cover layer of the cotton fibers made by intermeshing, the fibers being oriented approximately vertically with respect to the intermeshing while forming a space in between. The intermeshing and the cotton fibers can be combined in accordance with the required firmness. Further, the cotton fibers can be oriented closely and approximately parallel in accordance with their consistency and amounts.
In a further embodiment of the invention there is the option of at least one intermeshed cover layer having an insert which, for example, can be woven gauze.
The method for producing an absorbent body for medical use made of 100% cotton fibers provides that the cotton fibers are directly intermeshed on one side for forming a lower cover layer, that subsequently the initially still open top of the cotton fibers is intermeshed to form an upper cover layer, and that a space remains between the loop layers of the top and lower cover layers, in which the cotton fibers are oriented to a large extent vertically to the intermeshing.
Thus, in accordance with the invention an intermeshed fiber structure is advantageously created as a cost-efficient fiber bonding, wherein the ratio of solidity of the fiber bonding and the fluid absorption are optimally combined. In the process, the 100% cotton fibers are rigidly intermeshed with a fluid-permeable or -impermeable cover layer. Only the fiber ends are solidly bonded. These are either wales or transverse connections between the wales. The main portion of the cotton fibers remains arranged vertically and parallel in respect to each other and is therefore fully available to perform its function of retaining fluids.
Advantageously, the fiber bonding can no longer be dissolved into its components when used. The fiber bonds are caused mechanically, i.e. without chemical additives, and thus in a physiologically safe way. As explained above, the cotton fibers lie closely and relatively parallel next to each other. The ability to absorb fluids and the ability to retain fluids in relation to the built-in fiber weight is advantageously maximized by this fiber structure, i.e. the novel absorbent body for medical use.
The invention will be described in more detail in what follows by means of an exemplary embodiment represented in the drawings.
FIGS. 1 to 3 represent different process steps in a schematic view for producing an absorbent body for medical use in accordance with the invention.
In accordance with FIG. 1, bundled, 100% cotton fibers 10 are provided, which are provided with an intermeshing 12 for forming a lower cover layer 15. Thus there are loops 22. However, in this case the cotton fibers 10 are bonded only to the extent that, in accordance with FIG. 2, a large portion still remains free for their actual function as the absorption area 13, in which fluid is retained.
Subsequently, the top of the cotton fibers 10, which initially is still open, is intermeshed to form an upper cover layer 25 in accordance with FIG. 3. Thus there are loops 22'. As can be seen, a space 20 remains between the upper cover layer 25 and the lower cover layer 15, in which the cotton fibers 10 are aligned to a large extent in a vertical direction 14 with respect to the intermeshing 12. This orientation is superior to the random layers of a nonwoven or of a fibrous web of cotton wool, because the ability to store and retain fluids in the absorption area 13 is considerably higher in relation to the amount of cotton fibers used. On the other hand, because of the intermeshed cover layers 15 and 25, there is solid fiber bonding.
For absorbing fluids, the cotton fibers 10 are aligned optimally densely and parallel, depending on their consistency and amount. The loops 22 and the cotton fibers 10 are optimally combined as a function of the required sturdiness of the absorption body 1.
Methods, known per se, can be employed for producing an absorbent body for medical use in accordance with the instant invention, such as, for example, a method for producing a large- volume nonwoven material with surfaces compacted on one side (DE 43 09 990 A1). However, up to now this known method has only been used for producing a nonwoven material for sound abatement, heat insulating materials, filtering purposes and for upholstery combinations. In accordance with a further known technology (DE 42 18 234 C2), a nonwoven material is produced which up to now had been used for floor coverings, ceilings and as insulating materials.
Further, Malimo methods are the knit and the multiknit methods which up to now, however, have not yet been used for producing a material for absorbent bodies for medical use.
Altogether an absorbent body for medical use has been created, which has a high degree of fiber bonding along with a large fluid absorption and retention ability.
|Patente citada||Fecha de presentación||Fecha de publicación||Solicitante||Título|
|US3395065 *||6 Oct 1967||30 Jul 1968||Beacon Mfg Co||Non-woven blanket fabric and method|
|US3695270 *||22 Ene 1970||3 Oct 1972||Int Playtex Corp||Sanitary tampon|
|US3954074 *||16 May 1974||4 May 1976||Arno Edgar Wildeman||Textile|
|US3967472 *||10 Dic 1973||6 Jul 1976||Arno Edgar Wildeman||Stitch bonded fabrics|
|US4381805 *||9 Feb 1981||3 May 1983||Fieldcrest Mills, Inc.||Simulated grass pile fabric|
|US4426414 *||8 Sep 1982||17 Ene 1984||Beacon Manufacturing Company||Laminated non-woven fabric|
|US5192600 *||27 Dic 1990||9 Mar 1993||E. I. Du Pont De Nemours And Company||Stitchbonded comfort fabric|
|US5294479 *||3 Ago 1992||15 Mar 1994||Precision Custom Coatings, Inc.||Non-woven interlining|
|US5475904 *||1 Jul 1992||19 Dic 1995||Le Roy; Guy||Method and device for producing composite laps and composites thereby obtained|
|*||DE282587C||Título no disponible|
|DE4235858A1 *||23 Oct 1992||3 Mar 1994||Malimo Maschinenbau||Bonded zig-zag non=woven material - has two stitching stations to give variable stitching action on both sides.|
|DE4330824A1 *||13 Sep 1993||16 Mar 1995||Malimo Maschinenbau||Process and apparatus for consolidating the second surface of a bulky fleecy fabric already consolidated on one side|
|GB1138040A *||Título no disponible|
|GB2267511A *||Título no disponible|
|Patente citante||Fecha de presentación||Fecha de publicación||Solicitante||Título|
|US6735785 *||7 Mar 2002||18 May 2004||Kohji Takayama||Clothing waist portion structure|
|US7670665||8 Ene 2007||2 Mar 2010||The Procter & Gamble Company||Tufted laminate web|
|US7682686||17 Jun 2005||23 Mar 2010||The Procter & Gamble Company||Tufted fibrous web|
|US7718243||29 Ene 2008||18 May 2010||The Procter & Gamble Company||Tufted laminate web|
|US7732657||21 Jun 2005||8 Jun 2010||The Procter & Gamble Company||Absorbent article with lotion-containing topsheet|
|US7785690||13 Feb 2009||31 Ago 2010||The Procter & Gamble Company||Compression resistant nonwovens|
|US7789994 *||26 Oct 2007||7 Sep 2010||The Procter & Gamble Company||Clothlike non-woven fibrous structures and processes for making same|
|US7829173||22 May 2009||9 Nov 2010||The Procter & Gamble Company||Tufted fibrous web|
|US7838099||17 Jun 2005||23 Nov 2010||The Procter & Gamble Company||Looped nonwoven web|
|US7910195||12 May 2010||22 Mar 2011||The Procter & Gamble Company||Absorbent article with lotion-containing topsheet|
|US7935207||5 Mar 2007||3 May 2011||Procter And Gamble Company||Absorbent core for disposable absorbent article|
|US8075977||7 Abr 2010||13 Dic 2011||The Procter & Gamble Company||Tufted laminate web|
|US8153225||14 Sep 2010||10 Abr 2012||The Procter & Gamble Company||Tufted fibrous web|
|US8158043||6 Feb 2009||17 Abr 2012||The Procter & Gamble Company||Method for making an apertured web|
|US8241543||13 Oct 2005||14 Ago 2012||The Procter & Gamble Company||Method and apparatus for making an apertured web|
|US8357445||14 Feb 2011||22 Ene 2013||The Procter & Gamble Company||Absorbent article with lotion-containing topsheet|
|US8440286||6 Mar 2012||14 May 2013||The Procter & Gamble Company||Capped tufted laminate web|
|US8502013||5 Mar 2007||6 Ago 2013||The Procter And Gamble Company||Disposable absorbent article|
|US8657596||26 Abr 2011||25 Feb 2014||The Procter & Gamble Company||Method and apparatus for deforming a web|
|US8679391||11 Jul 2012||25 Mar 2014||The Procter & Gamble Company||Method and apparatus for making an apertured web|
|US8697218||1 Mar 2012||15 Abr 2014||The Procter & Gamble Company||Tufted fibrous web|
|US8702669||9 Jun 2011||22 Abr 2014||Pure Precision Limited||Diaper sheath with adjustable slide mechanism|
|US8708687||26 Abr 2011||29 Abr 2014||The Procter & Gamble Company||Apparatus for making a micro-textured web|
|US9023261||7 Ago 2012||5 May 2015||The Procter & Gamble Company||Method and apparatus for making an apertured web|
|US9033946||12 Mar 2010||19 May 2015||Pure Precision Limited||Diaper sheath|
|US9044353||26 Abr 2011||2 Jun 2015||The Procter & Gamble Company||Process for making a micro-textured web|
|US9120268||6 Ene 2014||1 Sep 2015||The Procter & Gamble Company||Method and apparatus for deforming a web|
|US20050148922 *||31 Dic 2003||7 Jul 2005||Reeves William G.||Thermoplastic composition and products made therefrom|
|US20050281976 *||17 Jun 2005||22 Dic 2005||Curro John J||Looped nonwoven web|
|CN100522119C||16 Dic 2003||5 Ago 2009||宝洁公司||Tufted fibrous web|
|EP2332504A1 *||16 Dic 2003||15 Jun 2011||The Procter & Gamble Company||Tufted fibrous web|
|WO2004058117A1 *||16 Dic 2003||15 Jul 2004||Procter & Gamble||Tufted fibrous web|
|WO2006009997A2 *||21 Jun 2005||26 Ene 2006||Procter & Gamble||Looped nonwoven web|
|Clasificación de EE.UU.||66/170, 66/190, 66/196|
|Clasificación cooperativa||A61F13/49003, A61F13/538|
|Clasificación europea||A61F13/49B, A61F13/538|
|27 Abr 1998||AS||Assignment|
Owner name: SPINNEREI C.B. GOLDNER GMBH & CO. KG, GERMANY
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GOESER, HANS JOACHIM;GRUNDIG, EGON;REEL/FRAME:009131/0788
Effective date: 19980311
|23 Jun 2004||REMI||Maintenance fee reminder mailed|
|25 Jun 2004||FPAY||Fee payment|
Year of fee payment: 4
|25 Jun 2004||SULP||Surcharge for late payment|
|25 Feb 2005||AS||Assignment|
|7 Feb 2008||AS||Assignment|
Owner name: PAUL HARTMAN AG, GERMANY
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:GRUNDIG, EGON;REEL/FRAME:020507/0299
Effective date: 20080127
|11 Mar 2008||FPAY||Fee payment|
Year of fee payment: 8
|25 May 2012||FPAY||Fee payment|
Year of fee payment: 12